ZWO Filters Duo-Band 2 inch improve your deep-sky photography in urban areas
Do you use a color camera and want to photograph emission nebulae without making the switch to a mono camera and filter wheel? Then the ZWO Duo-Band 2″ is a smart, instant upgrade. This filter combines Hα and OIII peaks in one filter, specially tuned for ZWO ASI color cameras such as the ASI294MC Pro, ASI2600MC Pro or the Seestar S50 (with adapter).
The Duo-Band 2″ filter is ideally suited for:
- Photography in light-polluted areas
- Nebulae and other deep-sky objects with a pronounced Hα or OIII signature
- Easy mounting without motorized filter wheel
With high transmission in both bands and excellent light blocking all around, you get a clearer image with more contrast even under moderate sky conditions.
What you can see / photograph with it
✓ Emission nebulae such as the Rosette Nebula, North American Nebula and Veil Nebula
✓ Planetary nebulae such as the Helix Nebula
✓ Supernova remnants (such as IC443)
✓ Deep-sky objects with strong OIII or Hα emission
✓ Better results under moderate or heavy light pollution
Specifications
| Feature | Value |
|---|---|
| Filter type | Duo-band narrowband filter |
| Format | 2 inches (50.8 mm) |
| Housing | Aluminum |
| Light transmission OIII | >90% at 486-501 nm |
| Light transmittance Hα | >80% at 656.3 nm |
| Bandwidth | OIII: 35 nm, Hα: 15 nm |
| Application | Deep-sky photography with color camera |
| Visual use | Possible, but primarily photographic |
| Compatibility | All 2” filter holders and ZWO color cameras (MC) |
| Design | UHC-type Duo-band design |
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